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Note 11 - Comprehensive Income - Components of Comprehensive Income That Are Included in Consolidated Statement of Changes in Shareholders' Equity (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2015
Change in unrealized gains (losses) on securities	$ (168)	$ 106	$ 96
Change in unrealized gains (losses) on securities	308	(194)	(178)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, Portion Attributable to Parent	515	29	(217)
Other comprehensive income (loss), available-for-sale securities, tax (expense)/(benefit)	(182)	(9)	76
Other comprehensive income (loss), available-for-sale securities adjustment, net of tax	333	20	(141)
Change in unrealized gains (losses) on securities	476	(300)	(274)
Gains Realized in Net Income [Member]
Less: Gains realized in net income	39	329	57
Less: Gains realized in net income	(14)	(115)	(20)
Less: Gains realized in net income	$ 25	$ 214	$ 37

X

- Definition

Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities, attributable to parent entity. Excludes amounts related to other than temporary impairment (OTTI) loss.

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